Shoemaker&#39;s jack



G. AND 0. LAPORTE.

SHOEMAKERS JACK.

APPLICATION FILED OCT-29.1919.

Patented July 19, 1921.

GASPARD LAPORTE, OF PAWTUCKET, AND OCTAVE LAPOR'IE, OF CENTERVILLE,

RHODE ISLAND. I

SHOEMAKEBS JACK.

recipes.

To (/71 whom it may concern:

Be it known that we. Gasrano Lsron'rn and Ovrivn Laroirrn, citizens ofthe United States, and residents of: Pawtucket and Genterville,respectively, in the counties of Providence and hent, respectively, andState oi? Rhode Island, have invented certain new and usefulImprovements in Shoemakers Jacks, of which the following is aspecification.

This invention relates to shoemakers jacks; and has for its object toprovide a simple, practical and effective jack oi: this character onwhich boots or shoes are held while being repaired. This jack is adaptedto receive and bind the shoe in position while l. eing operated upon,means being also provided whereby the member supporting the last may bereadily rotated to present the work in the most convenient position tobe operated upon.

A :lurther object oi the invention is to provide simple and effectivemeans whereby the last-supporting member may be readily looked in thestandard against relative rotation.

Vith these and other objects in view, the invention consists of certainnovel features oi construction, as will be more fully described, andparticularly pointed out in the appended claim.

In the accompanying drawings:

Figure 1- is a side elevation with one of the halves of the standardmember removed, showing the internal mechanism.

Fig. 9- is an edge view showing the standard member in section.

Fig. 3- shows a portion of the standard and the slot and notch forreceiving the tension-applying ioottreadle.

Fig. dis a top view of the standard, showing the trunnion member insection; also illustrating the side notches through which the arms oithe tension connector passes.

Fig. 5- is a face view of the locking cam lever.

Fig. (3 is a sectional view on line 66 of Fig. 5, showing the cam on theface ofthe lever.

Referring to the drawing, 10 designates the standard member oi ashoemakers jack, which is preferably tubular in form and made in halves,which halves are bolted to- Speoificntion of Letters Patent.

Patented July 19, 1%21.

Serial No. 334,205.

gether through the ears 11, the standard being supported on a suitablebase. Adjacent its lower portion this standard'is out out forming anelongated slot 12 for the purpose of receiving the treadle'memberpresently described.

The lower portion of this slot is ollset forming a treadle-retainingnotch 13.

T he treadle member is provided with a body portion 14; mounted to slidelongitudinally in the tubular standard and this body portion is providedwith a laterally-extendmg toot-engaging projection 15 which extends outthrough the slot and is adapted to be carried to one side to engage thenotch 13 after having been pressed downwardly by the foot of theoperator. The body of this treadle is provided with an eye 16 for thereception of one end of the tension spring 17.

On the upper end of this tubular standard is mounted an extension member18 whose lower end is provided with a. trunnion portion 19 whichprojects into the tubular standard, while the upper end of thisextension member is formed tapering as at 20 to receive the last 21which is mounted upon it.

Looped over this last is a strap 22 which is adapted to be raisedsufliciently when the treadle member is released from the notch, topermit a shoe, as shown in dotted lines, to be readily positioned on thelast after which the strap is slipped into place over the shank of theshoe to bind it securely in position.

The low r ends 2-3 of this strap are looped through the eyes 24 atopposite ends of the U-shaped tension member '25 the arms of whichtension member extend through recesses 26 formed in opposite sides ofthe trunnion 19 and aswivel 27 is interposed between the spring 17 andthe tension 1nember 25, whereby the extension member 18 may be rotatedwith the last to move the latter into any desired position withouttwisting the connecting parts.

It is found in practice necessary to provide simple and effective meansfor binding and retaining this trunnion portion 19 in the tubularstandard against rotation while operating upon a shoe.

To accomplish this in a simple and slicetive way, we have provi led acam-shaped portion 28 on one face of the car 11, see Fig.

4, and we have also provided cam-shaped limited only by the terms of theappended faces 29 on the inner face of the lever 30. A claim. bindingbolt 31 passes through the ears and We claim: said lever whereby adownward movement A shoemakers jack comprising a tubular of said leversprings the parts of the tubular standard, an extension member having astandard toward each other under action of trunnion at its lower endrotatably mounted the cam surfaces 28am]. 2}) thereby binding insaidstandard, a last mounted on the upand firmly securing the trunnionportion 19 per end of said extension, said trunnion be- 30 in thistubular member against relative roing provided withlongitudinally-disposed tation. recesses in opposite sides thereof, afoot This jack is extremely simple and inextreadle, said standard beingprovided with pensive in construction and effective in its a retainingnotch to receive said treadle, a operationand by its use a shoemaker maystrap looped over said last, a U-shaped 0011- 35 readily adjust it tohis requirements and nection member extending through said resecurelybind the work in operating position cesses, a spring and a swivelinterposed bethereon. tween said treadle and said connection-mem- Theforegong description is directed her, and means for bindlng saidtrunnion 1n solely toward the construction illustrated, adjustedposition. 40

but we desire it to be understood that we In testimony whereof we aflixour signareserve the privilege of resorting to all the tures.

mechanical changes to which the device is GASPARD LAPORTE. susceptible,the invention being defined and OCTAVE LAPORTE.

